58
ORGANIC SYNTHESIS—1995
LA.7.b.2-5 Castle, G.H. and Ley, S.V., TL, 35, 7455.
o-^—--^R
I.A.7.b.2-6 Lander, P.A. and Hegedus, L.S., JACS, 116, 8126;
Stephan, E. et al., TA, 5, 41; see also: Nilsson, K. and Ullenius, C, T,
50, 13173.
Ph
J»h
Ph
J»h
O
Y
1) RMgX, Cui
C0 2 Bn
► O
2) MeOH
Y
C0 2 Bn
R
74-98%, 4:1 to >25:lds
I.A.7.b.2-7 Groth, U. et al., LA, 885.
O
O
H 2 C=CRLi
OMe CuCN, BF 3 »OEt 2
OMe
52-81% t
R